Alert archive / Massachusetts / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 75, NWS Boston/Norton, MA

July 26, 2011Hampden County, Hampshire County, Massachusetts

NWS Boston/Norton, MA issued this severe thunderstorm warning at Jul 26, 2011, 4:15 PM EDT for Hampden County, Hampshire County, Massachusetts. It was in force for 60 min. 22 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jul 26, 2011, 4:15 PM EDT (20:15 UTC)
Expired: Jul 26, 2011, 5:15 PM EDT
In force: 60 min
Issued by: NWS Boston/Norton, MA
Area: Storm-based polygon

Counties Hampden County, MA, Hampshire County, MA

The radar

The Boston radar (KBOX), 115 km from the middle of the area, began a volume at 20:15 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What was reported inside it

Time	Report	Where	Remark
Jul 26, 4:17 PM EDT	FUNNEL CLOUD	Easthampton, MA	FUNNEL CLOUD
Jul 26, 4:26 PM EDT	HAIL 0.75	West Springfield, MA
Jul 26, 4:27 PM EDT	HIGH SUST WINDS 80	Chicopee, MA
Jul 26, 4:27 PM EDT	NON-TSTM WND GST 70	Chicopee, MA
Jul 26, 4:30 PM EDT	FUNNEL CLOUD	West Springfield, MA
Jul 26, 4:30 PM EDT	HAIL 1.75	Chicopee, MA	GOLF BALL SIZE HAIL
Jul 26, 4:33 PM EDT	HAIL 0.75	Chicopee, MA	0.75 INCH HAIL REPORTED BY OBSERVER AT CEF.
Jul 26, 4:34 PM EDT	TSTM WND DMG	Holyoke, MA	TREES DOWN ON LYMON AND PROSPECT STREETS
Jul 26, 4:34 PM EDT	HAIL 1.25	Springfield, MA	1 TO 1.25 INCH HAIL
Jul 26, 4:35 PM EDT	TSTM WND DMG	Chicopee, MA	TREES DOWN ON FULLER ROAD AND THE ROUTE 33 AREA. TREES DOWN ON WESTOVER ROAD. HOME DEPOT ON ROUTE 33 HAS A SIGNIFICANT AMOUNT OF DAMAGE TO SHEDS AND DISPLAYS. NO POWER IN THE AREA AND THE STORE IS CLOSED. TREES AND LARGE BRANCHES DOWN ON LEO DRIVE.
Jul 26, 4:35 PM EDT	TSTM WND DMG	Springfield, MA	TREES DOWN IN INDIAN ORCHARD AREA ON BERKSHIRE LANE AND SEVERAL OTHER STREETS. WIRES DOWN ON JOANNE ROAD. TREE DOWN ON HOUSE ON BREWSTER STREET. WIRES DOWN ON MEMORIAL DRIVE.
Jul 26, 4:35 PM EDT	HAIL 1.5	Springfield, MA	PING PONG SIZED HAIL AND TREES DOWN IN THE INDIAN ORCHARD SECTION.
Jul 26, 4:36 PM EDT	TSTM WND DMG	Chicopee, MA	TREES DOWN ON FULLER ROAD
Jul 26, 4:36 PM EDT	TSTM WND DMG	Springfield, MA	TREES DOWN ON LOCUST STREET. TREE DOWN ON HOUSE ON PARAMOUNT STREET WITH PERSON TRAPPED. TREES DOWN ON STUART STREET.
Jul 26, 4:36 PM EDT	HAIL 1	Springfield, MA
Jul 26, 4:37 PM EDT	TSTM WND DMG	Holyoke, MA	BOAT FLIPPED OVER ON THE CONNECTICUT RIVER. PEOPLE ON BOAT RESCUED AND TAKEN TO SHORE.
Jul 26, 4:40 PM EDT	TSTM WND DMG	South Hadley, MA	TREES DOWN AND SEVERAL ROAD CLOSURES.
Jul 26, 4:42 PM EDT	TSTM WND DMG	Ludlow, MA	TREES DOWN ACROSS WIRES
Jul 26, 4:42 PM EDT	HAIL 1.75	Ludlow, MA
Jul 26, 4:43 PM EDT	TSTM WND DMG	Wilbraham, MA	MANY TREES DOWN IN TOWN INCLUDING NEAR THE POLICE DEPARTMENT. MAIN STREET SHUT DOWN DUE TO DOWNED TREES.
Jul 26, 4:43 PM EDT	HAIL 1	Wilbraham, MA
Jul 26, 4:45 PM EDT	TSTM WND DMG	Springfield, MA	TREES DOWN ON A BUILDING WITH PEOPLE TRAPPED INSIDE IN INDIAN ORCHARD AREA. ALSO TREES UPROOTED IN THE VICINITY.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jul 26, 2:30 PM EDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Albany, NY (KALY), launched 12:00Z, 8.3 hours before the alert went out and 122 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 72 J/kg
Mixed-layer CIN: -57 J/kg
Mixed-layer LCL: 611 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 5 m²/s²
0-3 km storm-relative helicity: 36 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.1

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

343 
WUUS51 KBOX 262015
SVRBOX
MAC013-015-262115-
/O.NEW.KBOX.SV.W.0075.110726T2015Z-110726T2115Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TAUNTON MA
415 PM EDT TUE JUL 26 2011

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL HAMPDEN COUNTY IN WESTERN MASSACHUSETTS...
  THIS INCLUDES THE CITIES OF...SPRINGFIELD...CHICOPEE...
  SOUTHEASTERN HAMPSHIRE COUNTY IN WESTERN MASSACHUSETTS...

* UNTIL 515 PM EDT

* AT 414 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR
  SOUTHAMPTON...OR 6 MILES SOUTH OF NORTHAMPTON...AND WAS MOVING EAST
  AT 20 MPH.

* SOME LOCATIONS IN THE WARNING INCLUDE...HOLYOKE...WEST
  SPRINGFIELD...SOUTH HADLEY...GRANBY...LUDLOW...EAST LONGMEADOW...
  BELCHERTOWN...WILBRAHAM...HAMPDEN AND PALMER.

SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS AND LARGE HAIL...AS WELL
AS DEADLY LIGHTNING AND TORRENTIAL RAIN. GET TO SAFE SHELTER NOW...
INSIDE A STURDY BUILDING OR IN A VEHICLE. DO NOT SEEK SHELTER UNDER
TREES. IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY
LIGHTNING. DRIVERS SHOULD BE ALERT FOR PONDING OF WATER AND AVOID
FLOODED ROADS.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM EDT
TUESDAY EVENING FOR NORTHERN CONNECTICUT AND MASSACHUSETTS AND
SOUTHERN NEW HAMPSHIRE AND CENTRAL RHODE ISLAND.

&&

LAT...LON 4229 7223 4204 7236 4208 7265 4222 7276
      4230 7272
TIME...MOT...LOC 2014Z 292DEG 17KT 4223 7266

$$

NOCERA

The office that day

Everything else NWS Boston/Norton, MA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 26, 3:13 PM EDT	Severe Thunderstorm Warning	BOX	Franklin, Hampden, Hampshire	62 min
Jul 26, 4:09 PM EDT	Severe Thunderstorm Warning	BOX	Hampden, Hampshire	66 min
Jul 26, 4:10 PM EDT	Special Weather Statement	BOX	Franklin	65 min
Jul 26, 4:14 PM EDT	Areal Flood Advisory	BOX	Franklin, Hampden, Hampshire, Worcester	99 min
Jul 26, 4:28 PM EDT	Tornado Warning	BOX	Hampden, Hampshire	47 min
Jul 26, 4:51 PM EDT	Tornado Warning	BOX	Hampden, Worcester	39 min
Jul 26, 4:52 PM EDT	Severe Thunderstorm Warning	BOX	Hampden	53 min
Jul 26, 4:59 PM EDT	Areal Flood Advisory	BOX	Hampden, Worcester	98 min
Jul 26, 5:26 PM EDT	Areal Flood Advisory	BOX	Worcester	106 min
Jul 26, 5:30 PM EDT	Severe Thunderstorm Warning	BOX	Norfolk, Worcester	45 min
Jul 26, 6:22 PM EDT	Areal Flood Advisory	BOX	Bristol, Middlesex, Norfolk, Worcester	53 min

Nearby

Severe Thunderstorm Warnings in Massachusetts, 2011 Every severe thunderstorm warning in 2011

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.